The microstructural characterization and mechanical response of YSZ ceramic foams fabricated via volume-controlled foaming |
| |
Affiliation: | 1. Jiangxi Key Laboratory of Surface Engineering, Jiangxi Science & Technology Normal University, Nanchang, 330038, PR China;2. Analysis & Testing Center for Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, PR China;3. School of Chemistry and Chemical Engineering, Jiangxi Science & Technology Normal University, Nanchang, 330013, PR China |
| |
Abstract: | Yttria-stabilized zirconia (YSZ) ceramic foams are a promising class of materials for lightweight, high specific strength catalyst supports or insulation. Foam morphology is one of the most significant factors that dominate the mechanical properties of the YSZ ceramic foams. However, the foam morphology as a function of gravity and foam film strength for YSZ ceramic foams has been seldom reported up to now. Our work focuses on YSZ ceramic foams fabricated via a novel foam-gelcasting method using Isobam as gelling agent. The relative magnitudes of the foam film strength and the gravitational force can be changed by controlling the foaming yield of slurries. Both the remaining high-temperature strength and the critical difference temperature (△Tc) of YSZ (3.0) ceramic foams were higher than those of YSZ (5.0) ceramic foams, mainly owing to high closed-cells and relatively uniform distributed pore structure. In addition, the YSZ ceramic foams could not break suddenly like dense ceramics. This work demonstrates that tuning the foaming yield of slurries is a viable route to improved thermomechanical property in ceramic foams for use as insulation or catalyst supports in extreme environments. |
| |
Keywords: | Yttria stabilized zirconia Ceramic foams Compressive strength Volume-controlled foaming Thermomechanical property |
本文献已被 ScienceDirect 等数据库收录! |
|